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Jätkäsaari is a major urban residential district in Helsinki, Finland, undergoing transformation from a former 100-hectare industrial and harbour area into a vibrant seaside neighbourhood. Construction began in 2010 and is expected to continue through the end of the 2020s, with plans to accommodate approximately 17,000 to 18,000 residents and 6,000 workplaces by 2030.
The district is characterised by modern and experimental architecture, featuring diverse housing options including owner-occupied apartments, rental housing, student housing, and senior housing. Notable projects include the Airut block, designed by Berlin-based Sauerbruch Hutton, which combines residential units with offices and commercial spaces alongside innovative energy technology solutions. Wood City represents a showcase of Finnish timber construction, featuring residential and office buildings by Anttinen Oiva Architects. Additional significant projects include Malta, a cohousing complex by ARK-house architects initiated by private residents, and the Karlsson Housing by OOPEAA, which provides affordable housing with strict cost regulations.
The City of Helsinki serves as a primary developer alongside private developers and housing companies. The area emphasises sustainability, community-oriented design, and environmental responsibility, featuring green corridors including the S-shaped Park of Good Hope. Jätkäsaari remains connected to the mainland via public transport, primarily through the Helsinki tram network, whilst the passenger harbour continues operating with ferry connections to Tallinn, Estonia.